ing and sampling, paths will be made.
In so doing, vegetation will be
removed with the least possible disturbance to the underlying soil;
e.g., brush will be mowed down by either manual or mechanical means
which attempt to leave root structures intact. Any brush which is cut
will be collected and removed from the Pu suspect area and mechanically
chopped to make mulch.
All vegetation thus removed will be assumed to
be noncontaminated with plutonium, but will be treated respectfully as
though it might contain other radioactive contaminants.
Accordingly, it
will not be burned.
so
. pale
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n
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.
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:
x
3. -PIDLER readings will be made while the soil sampling is
being performed.
be documented
C.
Locations wnich give a clear plutonium response will
é
(by the surveyors)
along with the reading.
SAMPLING METHODS.
1.
(surface)
Samples will be taken at either the air-ground interface
or at depths beneath the interface
(profile).
Surface samples
will be obtained by using a “top-soil cutter" tool which will facilitate
removing sod to a depth of 5 cm within a well-defined area.
(or total area sampled)
will be sufficient to give a sample mass
which can be analyzed for plutonium by gamma spectroscopy
counting of Am-241 gammas) down to the 40 pCi/g range.
(absolute
The mass is to
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it
ha
a
atts
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EB
Profile sam-
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be determined but probably will be in the order of 0.5 kg.
tii,
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i
a.
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area
The cutter